//电视剧大图滚动
(function(jq){
    var posterTvGrid = function(o, options, data){
        this.parent = jq("#"+ o);
        this.body   = jq("body");
        if (this.parent.length <= 0) {
            return false;
        }

        this.options = jq.extend({}, posterTvGrid.options, options);
        if(typeof(data) !== 'object') return false;

        this.data = data || {};
        this.reset();
        //处理页面resize
        var _this = this;
        jq(window).resize(function(){
            _this.reset();
        });
    };
    posterTvGrid.prototype = {
        reset: function(options){
            if(typeof(options) == 'object'){
                jq.extend(this.options, options);
            }
            if(parseInt(this.body.outerWidth())>1255 || navigator.userAgent.indexOf('iPad') !== -1){
                this.options.width = 1190;
            }else{
                this.options.width = 970;
            }
            this.total = this.data.length;
            this.pageNow = this.options.initPage;
            this.preLeft = 0;
            this.nextLeft = this.options.width-530;
            this.preNLeft = -530;
            this.nextNLeft = this.options.width;
            this.pageNowLeft = (this.options.width-640)/2
            this.drawContent();
        },
        drawContent: function(){
            this.parent.empty();
            this.parent.css({width:this.options.width+"px", height:this.options.height+"px", position: "relative"});
            this.content = document.createElement("DIV");
            this.content.className = this.options.className;
            this.content.cssText = "width:"+this.options.width+"px;height:"+this.options.height+"px;cursor:move;position:absolute;";
            this.bottomNav = document.createElement("DIV");
            this.bottomNav.className = "bottomNav";
            for(var i=1; i<= this.total; i++){
                var bottomItem = document.createElement("DIV");
                bottomItem.className = "bottomNavButtonOFF";
                if(i == this.pageNow){
                    bottomItem.className = "bottomNavButtonOFF bottomNavButtonON";
                }
                bottomItem.setAttribute("ref", i);
                this.bottomNav.appendChild(bottomItem);
            }
            this.content.appendChild(this.bottomNav);
            this.bannerControls = '<div class="bannerControls"> <div class="leftNav" style="display: block;"></div> <div class="rightNav" style="display: block;"></div> </div>';
            this.content.innerHTML += this.bannerControls;

            this.contentHolder = document.createElement("DIV");
            this.contentHolder.style.width = this.options.width + 'px';
            this.contentHolder.style.height = this.options.height + 'px';

            for(var item=0, i = 1, l= this.data.length ; item < l ; ++item, ++i){
                var contentHolderUnit = document.createElement("DIV");
                contentHolderUnit.className = "contentHolderUnit";
                contentHolderUnit.setAttribute("ref", i);
                contentHolderUnit.setAttribute("id", 'contentHolderUnit' + (i));
                var unitItem = '<a href="'+this.data[item].url+'" class="elementLink">';
                unitItem += '</a>';
                unitItem += '<img src="'+this.data[item].img+'" alt="'+this.data[item].title+'"/>';
                unitItem += '<span class="elementOverlay"></span>';
                unitItem += '<span class="leftShadow"></span>';
                unitItem += '<span class="rightShadow"></span>';
                contentHolderUnit.innerHTML = unitItem;
                this.contentHolder.appendChild(contentHolderUnit);
            }
            this.content.appendChild(this.contentHolder);
            this.parent.append(this.content);
            this.parent.css({overflow:'hidden'});
            this.initContent();
            this.bind();
            this.start();
        },
        initContent: function(){
            contentHolderUnit = this.parent.find(".contentHolderUnit");
            contentHolderUnit.css({width:'0px',height:'0px', opacity: 0, left:this.options.width/2+'px', zIndex:0, marginTop: '135px'});
            this.parent.find(".contentHolderUnit:nth-child("+this.pageNow+")").css({width:'640px',height:'270px', opacity: 1, left: this.pageNowLeft+'px', zIndex: 3, marginTop: 0});
            this.parent.find(".contentHolderUnit:nth-child("+this.pageNow+") .elementOverlay").css({opacity:0});
            this.parent.find(".contentHolderUnit:nth-child("+this.pageNow+") .leftShadow").css({opacity:1});
            this.parent.find(".contentHolderUnit:nth-child("+this.pageNow+") .rightShadow").css({opacity:1});

            var pre = this.pageNow > 1 ? this.pageNow -1: this.total;
            var next = this.pageNow == this.total ? 1 : this.pageNow + 1;
            this.parent.find(".contentHolderUnit:nth-child("+pre+")").css({opacity: 1, left: this.preLeft+'px',height: '224px', width: '530px', zIndex: 0, marginTop: '23px'});
            this.parent.find(".contentHolderUnit:nth-child("+pre+") .elementOverlay").css({opacity:0.4});
            this.parent.find(".contentHolderUnit:nth-child("+pre+") .leftShadow").css({opacity:0});
            this.parent.find(".contentHolderUnit:nth-child("+pre+") .rightShadow").css({opacity:0});

            this.parent.find(".contentHolderUnit:nth-child("+next+")").css({opacity: 1, left: this.nextLeft+'px',height: '224px', width: '530px', zIndex: 0, marginTop: '23px'});
            this.parent.find(".contentHolderUnit:nth-child("+next+") .elementOverlay").css({opacity:0.4});
            this.parent.find(".contentHolderUnit:nth-child("+next+") .leftShadow").css({opacity:0});
            this.parent.find(".contentHolderUnit:nth-child("+next+") .rightShadow").css({opacity:0});
        },
        bind: function(){
            this.leftNav = this.parent.find(".leftNav");
            this.rightNav = this.parent.find(".rightNav");
            this.bottonNav = this.parent.find(".bottomNavButtonOFF");
            this.lists = this.parent.find(".contentHolderUnit");
            var _this = this;
            this.parent.mouseover(function(){
                _this.stop();
                _this.leftNav.show();
                _this.rightNav.show();
            });
            this.parent.mouseout(function(){
                _this.start();
                //_this.leftNav.hide();
                //_this.rightNav.hide();
            });

            _this.leftNav.click(function(){
                _this.turn("right");
            });
            _this.rightNav.click(function(){
                _this.turn("left");
            });
            _this.bottonNav.click(function(){
                var ref = parseInt(this.getAttribute("ref"));
                if(_this.pageNow == ref) return false;

                if(_this.pageNow < ref){
                    var rightAbs = ref - _this.pageNow;
                    var leftAbs = _this.pageNow + _this.total - ref;
                }else{
                    var rightAbs = _this.total - _this.pageNow + ref;
                    var leftAbs = _this.pageNow - ref;
                }
                if(leftAbs < rightAbs){
                    dir = "right";
                }else{
                    dir = "left";
                }

                _this.turnpage(ref, dir);
                return false;
            });

            _this.lists.click(function(e){
                var ref = parseInt(this.getAttribute("ref"));
                if(_this.pageNow == ref) {
                    return true;
                }else{
                    e.preventDefault();
                }
                if(_this.pageNow < ref){
                    var rightAbs = ref - _this.pageNow;
                    var leftAbs = _this.pageNow + _this.total - ref;
                }else{
                    var rightAbs = _this.total - _this.pageNow + ref;
                    var leftAbs = _this.pageNow - ref;
                }
                if(leftAbs < rightAbs){
                    dir = "right";
                }else{
                    dir = "left";
                }
                _this.turnpage(ref, dir);

            });
        },
        initBottomNav: function(){
            this.parent.find(".bottomNavButtonOFF").removeClass("bottomNavButtonON");
            this.parent.find(".bottomNavButtonOFF:nth-child("+this.pageNow+")").addClass("bottomNavButtonON");
        },
        start: function(){
            var _this = this;
            if(_this.timerId) _this.stop();
            _this.timerId = setInterval(function(){
                if(_this.options.direct == "left"){
                    _this.turn("left");
                }else{
                    _this.turn("right");
                }
            }, _this.options.delay);
        },
        stop: function(){
            clearInterval(this.timerId);
        },
        turn: function(dir){
            var _this = this;

            if(dir == "right"){
                var page = _this.pageNow -1;
                if(page <= 0) page = _this.total;
            }else{
                var page = _this.pageNow + 1;
                if(page > _this.total) page = 1;
            }
            _this.turnpage(page, dir);
        },
        turnpage: function(page, dir){
            var _this = this;
            if(_this.locked) return false;
            _this.locked = true;
            if(_this.pageNow == page) return false;

            var run = function(page, dir, t){
                var pre = page > 1 ? page -1: _this.total;
                var next = page == _this.total ? 1 : page + 1;
                var preP = pre - 1 >= 1 ? pre-1 : _this.total;
                var nextN = next + 1 > _this.total ? 1 : next+1;
                if(pre != _this.pageNow && next != _this.pageNow){
                    var nowpre = _this.pageNow > 1 ? _this.pageNow -1: _this.total;
                    var nownext = _this.pageNow == _this.total ? 1 : _this.pageNow + 1;
                    _this.parent.find(".contentHolderUnit:nth-child("+nowpre+")").animate({width:'0px',height:'0px', opacity: 0, left:_this.options.width/2+'px', zIndex:0, marginTop: '135px'}, t);
                    _this.parent.find(".contentHolderUnit:nth-child("+_this.pageNow+")").animate({width:'0px',height:'0px', opacity: 0, left:_this.options.width/2+'px', zIndex:0, marginTop: '135px'}, t);
                    _this.parent.find(".contentHolderUnit:nth-child("+nownext+")").animate({width:'0px',height:'0px', opacity: 0, left:_this.options.width/2+'px', zIndex:0, marginTop: '135px'}, t);
                }
                if(dir == 'left'){
                    _this.parent.find(".contentHolderUnit:nth-child("+_this.pageNow+")").css({zIndex: 0});


                    _this.parent.find(".contentHolderUnit:nth-child("+pre+") .elementOverlay").css({opacity:0.4});
                    _this.parent.find(".contentHolderUnit:nth-child("+pre+")").animate({opacity: 1, left: _this.preLeft+'px', height: '224px', width: '530px', zIndex: 2, marginTop: '23px'}, t);
                    _this.parent.find(".contentHolderUnit:nth-child("+pre+") .leftShadow").css({opacity:0});
                    _this.parent.find(".contentHolderUnit:nth-child("+pre+") .rightShadow").css({opacity:0});


                    _this.parent.find(".contentHolderUnit:nth-child("+page+")").css({zIndex: 3});
                    _this.parent.find(".contentHolderUnit:nth-child("+page+")").animate({opacity: 1, left: _this.pageNowLeft+'px', height: '270px', width: '640px', zIndex: 3, marginTop: '0'}, t);
                    _this.parent.find(".contentHolderUnit:nth-child("+page+") .elementOverlay").css({opacity:0});
                    _this.parent.find(".contentHolderUnit:nth-child("+page+") .leftShadow").css({opacity:1});
                    _this.parent.find(".contentHolderUnit:nth-child("+page+") .rightShadow").css({opacity:1});

                    _this.parent.find(".contentHolderUnit:nth-child("+next+")").css({opacity: 0, left: _this.nextNLeft+'px', height: '100px', width: '530px', zIndex: 2, marginTop: '85px'});
                    _this.parent.find(".contentHolderUnit:nth-child("+next+")").animate({opacity: 1, left: _this.nextLeft+'px', height: '224px', width:"530px", zIndex: 2, marginTop: '23px'}, t);
                    _this.parent.find(".contentHolderUnit:nth-child("+next+") .elementOverlay").css({opacity:0.4});
                    _this.parent.find(".contentHolderUnit:nth-child("+next+") .leftShadow").css({opacity:0});
                    _this.parent.find(".contentHolderUnit:nth-child("+next+") .rightShadow").css({opacity:0});
                    _this.parent.find(".contentHolderUnit:nth-child("+preP+")").css({zIndex:0});
                    _this.parent.find(".contentHolderUnit:nth-child("+preP+")").animate({width:'530px',height:'100px', opacity: 0, left:_this.preNLeft+'px', zIndex:0, marginTop: '85px'},t, "", function(){_this.locked=false;});


                }else{
                    _this.parent.find(".contentHolderUnit:nth-child("+_this.pageNow+")").css({zIndex: 0});

                    _this.parent.find(".contentHolderUnit:nth-child("+next+")").css({zIndex:2});
                    _this.parent.find(".contentHolderUnit:nth-child("+next+")").animate({opacity: 1, left: _this.nextLeft+'px', height: '224px', width: '530px', zIndex: 2, marginTop: '23px'}, t);
                    _this.parent.find(".contentHolderUnit:nth-child("+next+") .elementOverlay").css({opacity:0.4});
                    _this.parent.find(".contentHolderUnit:nth-child("+next+") .leftShadow").css({opacity:0});
                    _this.parent.find(".contentHolderUnit:nth-child("+next+") .rightShadow").css({opacity:0});

                    _this.parent.find(".contentHolderUnit:nth-child("+page+")").css({zIndex: 3}, t);
                    _this.parent.find(".contentHolderUnit:nth-child("+page+")").animate({opacity: 1, left: _this.pageNowLeft+'px', height: '270px', width: '640px', zIndex: 3, marginTop: '0px'}, t);
                    _this.parent.find(".contentHolderUnit:nth-child("+page+") .elementOverlay").css({opacity:0});
                    _this.parent.find(".contentHolderUnit:nth-child("+page+") .leftShadow").css({opacity:1});
                    _this.parent.find(".contentHolderUnit:nth-child("+page+") .rightShadow").css({opacity:1});

                    _this.parent.find(".contentHolderUnit:nth-child("+pre+")").css({opacity: 0, left: _this.preNLeft+'px', height: '100px', width: '530px', zIndex: 2, marginTop: '85px'});
                    _this.parent.find(".contentHolderUnit:nth-child("+pre+")").animate({opacity: 1, left: _this.preLeft+'px', height: '224px', width: '530px', zIndex: 2, marginTop: '23px'}, t);
                    _this.parent.find(".contentHolderUnit:nth-child("+pre+") .elementOverlay").css({opacity:0.4});
                    _this.parent.find(".contentHolderUnit:nth-child("+pre+") .leftShadow").css({opacity:0});
                    _this.parent.find(".contentHolderUnit:nth-child("+pre+") .rightShadow").css({opacity:0});

                    _this.parent.find(".contentHolderUnit:nth-child("+nextN+")").css({zIndex:0});
                    _this.parent.find(".contentHolderUnit:nth-child("+nextN+")").animate({width:'530px',height:'100px', opacity: 0, left:_this.nextNLeft+'px', zIndex:0, marginTop: '85px'}, t, "",function(){_this.locked=false;});
                }

                _this.pageNow = page;
                _this.initBottomNav();
            };

            run(page, dir,_this.options.speed);

        }

    };

    posterTvGrid.options = {
        offsetPages : 3,//默认可视最大条数
        direct : "left",//滚动的方向
        initPage : 1,//默认当前显示第几条
        className : "posterTvGrid",//最外层样式
        autoWidth : true,//默认不用设置宽
        width : 970,//最外层宽，需要使用的时候在传,默认由程序自动判断
        height : 310,//最外层高
        delay : 5000,//滚动间隔（毫秒）
        speed : 500 //滚动速度毫秒
    };

    window.posterTvGrid = posterTvGrid;
})(jQuery);
